Oil-well pump.



B. ANDREWS.

OIL WELL PUMP. APPLxoATIon FILED SEPT. 19, 1910.

Patented Jan. 2, 1912.

cnLullilA PLANonllAPH cu.. wAsmNumN. n. c.

BENJAMIN ANDREWS, 0F LOS ANGELES, CALIFORNIA.

OIL-WELL PUMP.

Specification of Letters Patent.

Patented Jan. 2, 1912.

Application filed September 19, 1910. Serial No. 582,667.

To all whom 'it may concern:

Be it known that I, BENJAMIN ANDREWS, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Oil-Tell Pumps, of which the following is a specification.

This invention relates to oil pumps such as used in raising oil from oil wells. Such pumps raise considerable sand with the oil, and this sand often clogs above the upper valve in such a way as to materially intertere with the eflicient operation of the pump.

The object of this invention is to construct the pump in such a way as to enable this sand to be dislocated and driven up to the discharge outlet of the pump.

A further object of the invention is to prevent the sand from collecting between the plunger and the side of the barrel 1n which the plunger operates. By doing this I prevent the saiid from cutting and scouring the pump barrel and plun er which would materially decrease the e ciency of the pump.

A further object of the invention is to construct the pump so that either the barrel of the ump or the plunger of the pump may be lield fixed or reciprocated.

In the annexed drawing which fully illustrates my invention, Figure 1 is a vertical central section through an oil well pump constructed according to my invention, certain parts being shown broken away. This view represents the sucker rod as being held stationary, the barrel bein moved by the pump lever. Fig. 2 is a si e elevation and partial section taken in a plane at about right angles to that shown in Fig. 1, and

showing the upper parts of the ump, certain parts bein@ broken away. tig. 3 is a section on the Iine 3-3 of Fi 1. Fig. 4 is a view similar to Fi 1, but showing onl the upper ortion o the oil well pump antI7 showing t e arrangement when the sucker rod is moved and the barrel held stationary.

Referrin more particularly to the parts, and especia ly to Fig. 1, 5 represents the casing of the oil well, which is set in the earth in the usual manner and formed of sections of pipe coupled together. On the upper end of the casing 5, I attach a post 6, the lower end of which is formed into a ring 7 which has threads which enables it to be attached to the upper end of the casing by a coupling 8, as shown. The body of the post 7 is bifurcated so as to form legs 9, and these legs are connected above by a head 10, said head having a chamber 1l formed within it. In the bottom wall of this chamber 11 the upper end of the tubular sucker rod 12 is secured, as indicated, and in the end wall of the chamber 11, a horizontal delivery )ipe 13 is provided, through which the oil rom the well is delivered. The sucker rod is also tubular, and is formed with an extension 14 of reduced diameter which forms a plunger, and this plunger tits in the bore of the working barrel 15, the lower end of which is provided with a cap 1G, said cap being provided with a valve 17 having a ball 18, as shown. In addition to this, the under side of the cap is provided with a downwardly extending lip 19, which assists in breaking up clods of sand in the casing.

The upper end of the barrel 15 has a threaded connection with a tubing 20, which tubing is of larger diameter than the sucker rod, and is provided at its upper end with a stuffing box having a suitable packing 21 and a suitable stuffing box nut 22. On the upper end of this tubing 20 a'yoke 23 is attached. which is in the form of a bent bar, the ends of which are connected by bolts 24 to the sides of the tubing at diametrically opposite points. The upper end forms a bight or *bend 25, to which the lever 26 is connected by a suitable link 27, as shown. In the lower end of the plunger 14, a traveling valve 28 is attached, said valve having a ball 29 for checking a backward ow from the valve. This valve is similar to the lower valve, but smaller.

In the interior of the plunger a liner or wash pipe 30 is provided, the body of which is of reduced diameter, so as to form an annular space 31 between its wall and the wall of the plunger. The lower end of the wash pipe is formed into an enlarged head 32, which fits neatly in the bore of the plunger, and this head is disposed adjacent tol the valve 28 and is provided with a. plurality of flushing vents 33. These fiushing vents incline downwardly and inwardly as indicated in Figs. 1 and 3, and they all are inclined in the same way for a purpose which will appear more fully hereinafter.

In the upper portion of the plunger 14 above the working barrel 15, the plunger wall is provided with a plurality of ports 34, and these ports communicate with the annular space 35 which is formed within the tubing 20 around the upper portion of the tubular sucker rod. This annular space 35 acts as a downward assmorl'tvl'iirci is to be pumped into 1 roug a nipple 3G passing through the wall of the tubing, as shown, and this nipple is connected by a fiexible hose 37 with an auxiliary pump 38.

A pump constructed as described is adapted to have the lower valve 17 reciprocated by means of the lever 26 and the oil which is raised from the well passes up through the valve 1'? and the valve 28 successively and through the tubular sucker rod 12 and is delivered through the delivery pi e 13. The reciprocation of this lower va ve 17, which valve ordinarily may stand stationary, is highly advantageous as it enables the valve to be loosened up in case sand is clogged about it. While the tubing 20 is bein-g reciprocated in this manner, connection is maintained through the hose 37 with the pump 38. And the pump 3S is operated continually so as to force oil under pressure through the receiving chamber 35 and from this point the oil passes through the port 34 into the iusbing space 31 around the wash pipe 30, and from the lower end of this wash pipe this oil passes through the ports 33 directly onto the ball 29 of the valve 28 and scours out the sand which may have lodged under the ball passing down intermittently through this valve and to the valve 17. This oil finally passes up throu h the traveling valve and sucker rod to t e surface. It should be understood that the oil is under considerable pressure, so that when admitted to the valve 28, it moves in the direction of the arrows indicated in Fig. 3 giving rise to a centrifugal scouring movement.

A pump constructed as described ma be adapted for reciprocating the suckerrc instead of the barrel, in which case I dispense withthe post 6 and substitute a clamp 39, which is formed in sections 40 having ears 11 at the sides thereof, by means of which the sections are attached together b clamping bolts 42. This clamp is attac ed rigidly to a tubing 43, which is similar to the tubing 20, and through this tubing 43 a tubular sucker rod 44 passes downwardly, said sucker rod being closed above by a cap 45 provided with a lateral nipple 46 to which a flexible discharge hose may be attached (not shown). The tubing 43 is of considerably larger diameter than the sucker rod 44 so as to form an annular receiving space 47 to which oil is to be forced through a nipple 48, said nipple being connected by a ipe 49 to a pump similar to the pump 38. It should be understood that the parts of the pump in Fig. 4 not illustrated are identical with the corresponding parts shown in Fig.

Y vents for 1. The sucker rod 44 may be reciprocated by a pump lever 50 connected by a cap 45 with the link 51.

lf any sand is accumulated in the interior of the plunger over the traveling valve 28,

`the pressure of the oil introduced through the wash pipe 30 will force the sand upwardly through the tubular sucker rod 12 and to the discharge outlet. On account of the fact that the oil in the annular space 35 is under pressure, this oil tends to force itself downwardly around the plunger 14 and on the interior of the barrel 15. In this way oil constantly works downwardly on the face of the plunger and prevents any sand from working upwardly from the lower end of the plunger, which might score the rubbing surfaces of the plunger and barrel.

Vhat I claim is:

1. A pump of the class described having a vertical traveling member, means for reciprocating said member, a valve in connec tion with said member through which the oil may pass upwardly, and means for conducting oil under pressure to said valve to Hush the same.

2. In a pump of the class described, in combination, a tubular sucker rod havin a plunger formed at the lower end thereo a barrel surrounding said plunger, said plunger and said barrel having valves in the lower ends thereof respectively, means for reciprocating said sucker rod, a tubing connecting with said valve, means for reciprocating said tubin to reciprocate said barrel, and means for agmittin oil under pressure through said tubing an down said plunger to the valve carried by saidplunger to Hush the same.

3. In a pump of the class described, in combination, a tubular member, a valve mounted therein, a wash pipe extending longitudinally with said tubular member and cooperating therewith to form an annular duct, means for conducting oil under pressure to said duct, said wash ipe having rejecting said oil un er pressure to said va ve to flush the same.

4. In a pump of the class described, in combination, a casing, a sucker rod extending downwardly into said casing, means for temporarily supporting said sucker rod in a fixed position, a tubing surrounding said sucker rod, a barrel connected with said tubing, said sucker rod having a plunger extending into said barrel, a valve in the lower end of said lunger, a second valve in the lower end ofp said barrel, said tubing bein of larger diameter than said sucker rod an forming a receiving space thereabout, means for introducing oil under pressure into said receiving space, and means for conduetin oil from saldreceiving space to one of sai valves.

5. A pump of the class described, comprising a reclprocating barrel and a plunger capable of reciprocation therein, the barrel having a space between it and the plunger near its upper end for forming an oil chamber while the plunger is formed with a concentric chamber within its lower end forming an oil chamber, the said plunger having openings for establishing communication between the two oil chambers and means for forcing oil-into the outer chamber whereby it will lubricate and prevent the rising of sand between the barrel and the plunger and will find an outlet within the said plunger.

6, A pump of the class described, having a barrel and a plunger movably mounted therein, a space being left between the barrel and the plunger near the upper end of the former for receivingr oil, the said plunger having a recess near its lower end for receiving oil and having communication with the passage in the barrel whereby oil is delivered from the same into the plunger, a valve mounted in the lower end of the plunger and adapted to be scoured by the said oil entering through the said passage, the said barrel also having a valve at its lower end and a projecting lip carried by the said barrel adjacent to said valve fory preventing the valve from becoming clogged.

7. A pump of the class described having a barrel, a tubular plunger reciprocating with respect to said barrel, a valve at the lower' end of said tubular plunger, a tubing surrounding the said tubular plunger, and forming an oil chamber, means for forcing oil under pressure into said oil chamber, and means for conducting said oil from said oil chamber to a point near said valve tending to produce an upward flow of oil in said tubular plunger under pressure to scour said tubular plunger.`

8. An oil pump having a tubular member for guiding the oil upwardly from the well, a valve adapted to check a return flow of the oil toward the well, and means for conducting oil under pressure into said tubular member at a point near said valve so as to scour said tubular member of sand above said valve.

In Witness that I claim the foregoing I have hereunto subscribed my name this 2nd day of September, 1910.

BENJAMIN ANDREW'S.

Witnesses:

F. D. AMMEN, E. R. POLLARD.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

